Container and lid combination with a sealing gasket and closing ring

Abstract

A container assembly for transporting and storing flowable materials according to one embodiment of the present invention comprises a drum including a lip edge defining a top opening, a lid constructed and arranged to fit over and close the top opening, a closing ring constructed and arranged for securing the lid to the lip edge, and an elastomeric gasket positioned between the lip edge and the lid, the lip edge being constructed and arranged for the formed sidewall, shaped to define a hollow interior, said sidewall including an outwardly facing, concave section.

1 . A container assembly comprising:
 a drum including a lip edge defining a top opening;   a lid constructed and arranged to fit over and close said top opening;   a closing ring constructed and arranged for securing said lid to said lip edge; and   an elastomeric gasket positioned between said lip edge and said lid, said lip edge being constructed and arranged with a formed sidewall, said formed sidewall being shaped to define a hollow interior, said sidewall including an outwardly-facing, concave section.   
     
     
         2 . The container assembly of  claim 1  wherein said drum is metal and said lip edge is coiled into itself to create said hollow interior. 
     
     
         3 . The container assembly of  claim 2  wherein said coiled lip edge includes a part-circular section in lateral cross section in combination with said concave section. 
     
     
         4 . The container assembly of  claim 3  wherein said coiled lip edge includes a first transition edge between a first side of said concave section and said part-circular section and a second transition edge between a second side of said concave section and said part-circular section. 
     
     
         5 . The container assembly of  claim 4  wherein said concave section having a circumferential extent of approximately between 60 and 90 degrees. 
     
     
         6 . The container assembly of  claim 5  wherein said lid includes a curved outer lip constructed and arranged to lay over said drum lip edge and to define with said concave section a gasket capturing pocket. 
     
     
         7 . The container assembly of  claim 6  wherein said first transition edge is axially directed, relative to said drum, toward said lid outer lip. 
     
     
         8 . The container assembly of  claim 7  wherein said closing ring is tightenable for clamping together said lid outer lip and said drum edge lip with said gasket positioned between the lid outer lip and the drum edge lip, the gasket being compressed by said clamping together, said compressed gasket having a higher density portion and a lower density portion. 
     
     
         9 . The container assembly of  claim 8  wherein said higher density portion being radially outwardly of said first transition edge and said lower density portion being radially inwardly of said first transition edge. 
     
     
         10 . The container assembly of  claim 1  wherein said gasket is constructed and arranged in lateral cross section with a surrounding wall that defines a hollow interior. 
     
     
         11 . The container assembly of  claim 10  wherein said surrounding wall has an outer peripheral shape that includes a curved section, a linear section, and a concave section. 
     
     
         12 . The container assembly of  claim 11  wherein said lip edge includes a first transition edge between said concave section and the remainder of said lip edge and said first transition edge being positioned in a recessed space of said concave section. 
     
     
         13 . The container assembly of  claim 1  wherein said concave section having a circumferential extent of approximately between 60 and 90 degrees. 
     
     
         14 . The container assembly of  claim 1  wherein said lip edge includes a part-circular section in lateral cross section in combination with said concave section. 
     
     
         15 . The container assembly of  claim 14  wherein said lip edge includes a first transition edge between a first side of said concave section and said part-circular section and a second transition edge between a second side of said concave section and said part-circular section. 
     
     
         16 . The container assembly of  claim 1  wherein said lid includes a curved outer lip constructed and arranged to lay over said drum lip edge and to define with said concave section a gasket capturing pocket. 
     
     
         17 . The container assembly of  claim 1  wherein said closing ring is tightenable for clamping together said lid outer lip and said drum edge lip with said gasket positioned between the lid outer lip and the drum edge lip, the gasket being compressed by said clamping together, said compressed gasket having a higher density portion and a lower density portion. 
     
     
         18 . The container assembly of  claim 17  wherein said higher density portion being radially outwardly of said first transition edge and said lower density portion being radially inwardly of said first transition edge. 
     
     
         19 . A container assembly comprising:
 a drum including a lip edge defining a top opening;   a lid constructed and arranged to fit over and close said top opening;   a closing ring constructed and arranged for securing said lid to said lip edge; and   an elastomeric gasket positioned between said lip edge and said lid, said gasket having a lateral cross section shape and construction that includes a surrounding wall that defines a hollow interior, said surrounding wall having a peripheral shape that includes a curved section, a linear section, and a concave section.   
     
     
         20 . A container assembly comprising:
 a drum including a lip edge defining a top opening;   a lid constructed and arranged to fit over and close said top opening;   a closing ring constructed and arranged for securing said lid to said lip edge; and   an elastomeric gasket positioned between said lip edge and said lid, said lip edge being constructed and arranged with a sidewall shaped to define a curved recess, a lower shelf, a first wall section, a ramp section, a second wall section, a curved section, and a top edge.   
     
     
         21 . The container assembly of  claim 20  wherein said curved section in cooperation with said lid define a capturing pocket for said gasket. 
     
     
         22 . The container assembly of  claim 21  wherein said closing ring is tightenable for clamping together a lid outer lip and said drum lip edge with said gasket positioned between the lid outer lip and the drum lip edge, the gasket being compressed by said clamping together, said compressed gasket having a higher density portion and a lower density portion. 
     
     
         23 . The container assembly of  claim 22  wherein said higher density portion being radially outwardly of said top edge and said lower density portion being radially inwardly of said top edge. 
     
     
         24 . The container assembly of  claim 23  wherein said gasket is constructed and arranged in lateral cross section with a surrounding wall that defines a hollow interior. 
     
     
         25 . The container assembly of  claim 24  wherein said surrounding wall has an outer peripheral shape that includes a curved section, a linear section, and a concave section. 
     
     
         26 . The container assembly of  claim 20  wherein said gasket is constructed and arranged in lateral cross section with a surrounding wall that defines a hollow interior. 
     
     
         27 . The container assembly of  claim 26  wherein said surrounding wall has an outer peripheral shape that includes a curved section, a linear section, and a concave section.